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Ohio gunman's ex-classmates decry missed chances to stop him
By Julie Carr Smyth & Michael Biesecker
Police: Suspect's sister among those killed in Oregon District shooting
Ex-girlfriend of Dayton shooter saw warning signs, struggles with mental illness
By Scott Stump
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Dayton Gunman Had Been Exploring 'Violent Ideologies,' F.B.I. Says (Published 2019)
By Campbell Robertson, Mitch Smith & Rick Rojas
Dayton gunman reportedly had hit lists, fascination with shootings: 'Everyone knew who he was'
By Erik Ortiz, Gabe Gutierrez & Ben Kesslen
Dayton Ohio shooting: Connor Betts's motive remains under investigation
By Emily Davies, Tim Craig & Hannah Natanson
The Dayton shooter's ex-girlfriend says he was fascinated with mass shootings
By Emanuella Grinberg, Scott Bronstein & Drew Griffin
At least 31 killed in US weekend mass shootings: The latest
By Mike Hayes, Veronica Rocha & Elise Hammond
Exclusive video shows Dayton gunman Connor Betts in bar in the hours before shooting
By Curt Devine, Noah Gray & Mark Morales
Dayton shooter had an obsession with violence and mass shootings, police say
By Paul P. Murphy, Eric Levenson & Scott Bronstein
Gunman in Dayton Had History of Threatening Women, Former Friends Say (Published 2019)
By Timothy Williams, Campbell Robertson & Nicholas Bogel-Burroughs